diff --git a/vignettes/develop_advanced.Rmd b/vignettes/develop_advanced.Rmd
index 7c3a9879..8976d0f3 100644
--- a/vignettes/develop_advanced.Rmd
+++ b/vignettes/develop_advanced.Rmd
@@ -178,7 +178,7 @@ Typically the HTML "housing" for a widget is just a `<div>` element, and this is
 
 ```r
 sparkline_html <- function(id, style, class, ...){
-  tags$span(id = id, class = class)
+  tags$span(id = id, class = class, style = style)
 }
 ```